highlightranges.qml Example File

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  import QtQuick 2.0
  import "content"

  Rectangle {
      id: root
      property int current: 0
      property bool increasing: true
      // Example index automation for convenience, disabled on click or tap
      SequentialAnimation {
          id: anim
          loops: -1
          running: true
          ScriptAction {
              script: if (increasing) {
                          current++;
                          if (current >= aModel.count -1) {
                              current = aModel.count - 1;
                              increasing = !increasing;
                          }
                      } else {
                          current--;
                          if (current <= 0) {
                              current = 0;
                              increasing = !increasing;
                          }
                      }
          }

          PauseAnimation { duration: 500 }
      }
      MouseArea{
          id: ma
          z: 1
          anchors.fill: parent
          onClicked: { z = 1 - z; if (anim.running) anim.stop(); else anim.restart();}
      }

      width: 320; height: 480

      // This example shows the same model in three different ListView items,
      // with different highlight ranges. The highlight ranges are set by the
      // preferredHighlightBegin and preferredHighlightEnd properties in ListView.
      //
      // The first ListView does not set a highlight range, so its currentItem
      // can move freely within the visible area. If it moves outside the
      // visible area, the view is automatically scrolled to keep the current
      // item visible.
      //
      // The second ListView sets a highlight range which attempts to keep the
      // current item within the bounds of the range. However,
      // items will not scroll beyond the beginning or end of the view,
      // forcing the highlight to move outside the range at the ends.
      //
      // The third ListView sets the highlightRangeMode to StrictlyEnforceRange
      // and sets a range smaller than the height of an item.  This
      // forces the current item to change when the view is flicked,
      // since the highlight is unable to move.
      //
      // All ListViews bind their currentIndex to the root.current property.
      // The first ListView sets root.current whenever its currentIndex changes
      // due to keyboard interaction.
      // Flicking the third ListView with the mouse also changes root.current.
      ListView {
          id: list1
          height: 50; width: parent.width
          model: PetsModel {id: aModel}
          delegate: petDelegate
          orientation: ListView.Horizontal

          highlight: Rectangle { color: "lightsteelblue" }
          currentIndex: root.current
          onCurrentIndexChanged: root.current = currentIndex
          focus: true
      }

      ListView {
          id: list2
          y: 160
          height: 50; width: parent.width
          model: PetsModel {}
          delegate: petDelegate
          orientation: ListView.Horizontal

          highlight: Rectangle { color: "yellow" }
          currentIndex: root.current
          preferredHighlightBegin: 80; preferredHighlightEnd: 220
          highlightRangeMode: ListView.ApplyRange
      }

      ListView {
          id: list3
          y: 320
          height: 50; width: parent.width
          model: PetsModel {}
          delegate: petDelegate
          orientation: ListView.Horizontal

          highlight: Rectangle { color: "yellow" }
          currentIndex: root.current
          onCurrentIndexChanged: root.current = currentIndex
          preferredHighlightBegin: 125; preferredHighlightEnd: 125
          highlightRangeMode: ListView.StrictlyEnforceRange
      }
      // The delegate for each list
      Component {
          id: petDelegate
          Item {
              width: 160
              height: column.height
              Column {
                  id: column
                  Text { text: 'Name: ' + name }
                  Text { text: 'Type: ' + type }
                  Text { text: 'Age: ' + age }
              }

              MouseArea {
                  anchors.fill: parent
                  onClicked: root.current = index
              }
          }
      }
  }